Valve



Jne 9,v 1931. E. MULLER 1,809,419

VALVE Filed Jan.I 4, 1927 Z INVENTOR MMV, A

BY v

l ATTORNEY Patented June 9, 1931 STATS VALVE Application led January 4,V1927. Serial No. 158,924.

`One object of the invention is to provide a water supply controllingvalve which embodies novel and improved features of construction wherebyhammering or pounding of the valve head into closed position as commonlytakes place yin spring closed valves under large water pressures, isprevented, so that both the noise and vibration incident to suchhammering or snap closing of the valve as well as the wear and tear uponthe valveincident to hammering and pounding is obviated.

Other objects of the invention are to provide a water supply controllingvalve so constructed that the valvehead is prevented from being forcedagainstits seat with a snap action and under the full pressure of thewater in thedirection of closing, so that the valve closes substantiallynoiselessly and with slight impact upon the seat thereof; to providenovel and improved means for retarding the closing movement of the valvehead of a sliding stem valve; 'to accomplish this result by meanswhereby the valve head operates in an inverted cup arranged tosurroundthe valve seat and having restricted ports therein communicatingwith the water supply; to provide a novel and improved dash-potconstruction for a sliding stem liquid supply valve for preventing snapclosing and hammering of the valve head rupon its seat, and to obtainother results and advantages as may be brought out by the followingdescription.

Referring to the accompanying drawings, in which corresponding and like.parts are designated throughout the several views by the same referencecharacters,

Figure l is an enlarged vertical sectional Vview of the water supplycontrolling valve,

showing the valve in closed position;

Figure 2 is a horizontal sectional view, taken on the line 2- 42 ofFigure l;

Figure 3 is a fragmentary view similar to Figure 1, showing the valve atthe beginning of the closing operation, and

`Figure 4 is a similar View showing a modified form of the valve.

Specifically describing the embodiment of my invention illustrated inFigures 1-3, in-

clusive, the valve 7 comprises a casing having inlet and outlet passages50 and 51 respectively, separated by a diaphragm or partition 52 throughwhich is a valve opening 53 disposed at substantially right angles tothe inletvand outlet passages 50 and 5l, and having at the inlet sidethereof a valve seat 54 with which cooperates a valve head 55 carried bya stem 56 which is slidably mounted at. one end in the valve neck57 atone side of the seat 54, and at its other end in a cap 58 which closesthe valve casing at the other side ofthe seat 54. The stem 56 isnormally influenced by a compression spring 59 to move the valve head 55against its seat 54 to close the valve opening 53, said spring beinginterposed between the cap 58 and a` piston disk 60 fast on the valvestem and having a loosely slidable relation to the valve casing. Thevalve may be opened by any suitable means such as the lever 34.

To retard the movement of the valve head 55 to its seat 54 and therebyprevent snap or hammer action of the valve head upon the seat, I providean inverted cup 6l which is co-axially arranged for loose slidingmovement upon the valve stem 50 and over` the valve head 55 so that thevalve head serves as a piston, the open endof said cup being arranged toabut against the partition 52 and surround the valve seat 54 and beingnormally iniiuenced toward said partition by a light compression spring63 interposed between the cup and disk 60. rlhe cup is longer than thevalve head 55, and adjacent the outer edge thereof isformed with aplurality of small transverse openings 64 which permit water to iiowinto the cup when the same is seated up the partition 52.

When the valve is in normal closed position, the parts are located asshown in Figure l, the valve head 55 being seated, upon the seat 54 andthe edge of the cup 61 abutting against the partition 52, the openings64 in the cup being closed by the valve head 55. Obviously, the space inthe cup 6l behind the valve head 55 will be lled with water, and as thevvalve stem 56 is moved by the lever 34C inwardly of the casing, thevalve head 55 is moved from its seat 54 and simultaneously the cup 61 ismoved away from the partition 52. Free iiow of water is thus permittedfrom the inlet passage 50 through the valve opening 53 to the outletpassage 51. lVhile the valve remains in open position the spring 63gradually forces the cup 61 toward the partition 52, so that the closedend of the cup rests upon the valve head 55. The proportion of theparts, however, is such that the valve head holds the cup off thepartition 52 to permit free flow of the water through the valve opening53. When the valve stem is released by the lever 34 the spring 59 movesthe valve head toward its seat, but the edge of the cup 61 strikes thepartition before the valve head reaches the seat, as shown in Figure 3of the drawings. rlhe movement of the valve head toward the seat is thenretarded due to the fact that it must move relatively to the cup 61, andin so moving in the cup 61 creates a suction between itself and theclosed end of the cup. The water flows into the cup through the openings64, and some of it passes between the valve head and the walls of thecup into the space between the closed end of the cup and the valve head.The passages thus provided, however, are so small thatv the movement ofthe valve head is necessarily slow; and accordingly the valve headapproaches the seat 54: slowly and easily and without any materialimpact or hammering action. Snap action of the valve is also reduced bythe disk 60 through a similar action.

Hammering or snap action of the valve may be further reduced by aconstruction such as shown in Figure 4, where the cup 6l has arranged onthe top thereof a cup 66 within which is loosely reciprocable a pistondisk 67 fast to the valve stem 56. rihis piston disk 67 corresponds tothe disk 6() shown in Figures 1 and 3, but is of considerably lessdiameter and cooperates with the cup or cylinder 66 instead of with thevalve casing. lVhen the valve is closed the piston 67 is arranged withinthe cylinder 66, and of course the cylinder is filled with water. Uponmovement of the valve stem 56 to open the valve, the cylinder 66 moveswith the piston 67 and the Vvalve stem, as does also the cup 61, butafter the valve has remained open a short time the cylinder 66 is movedaway from the piston 67 as is also the cup 61.v As the valve starts toclose, the cup 61 engages the partition 52 and thereafter the valve stemand piston 67 move relatively to the cylinder 66 which is fixed withrespect to the partition, and as the piston 67 must partially displacethe water in the cylinder 66 and the How of water from the piston isrestricted by the close lit of the piston therein, the movement of thevalve stem under the influence of the spring 59 is thus retarded.

Preferably, the seat of the valve is removable and may be in the form ofan exteriorly screw threaded bushing or tube 68 fitted in a screwthreaded opening 69 in the partition 52.

0f course, while l have shown the cup 61 cooperating with the valvehead, and the cylinder 66 with the piston 67 used together in one valve,these two retarding means might be used separately and independently indifferent valves. Furthermore, it will be obvious that the invention issusceptible of use in pump valves and many other different types ofvalves than that illustrated and described, and that the details ofconstruction of the valve may be modified and changed by those skilledin the art without departing from the spirit or scope of the invention.Therefore, I do not desire to be understood as limiting myself except asrequired by the following claims when construed in the light of theprior art.

Having thus described the invention, what I claim is:

1. A valve comprising a body having an inlet and an outlet separated bya partition with a valve opening surrounded by a valve seat, a valvestem slidably supported in said body at opposite sides of said valveopening, a valve head fixed on said stem to cooperate with said valveseat, a cup slidable upon said valve stem providing a cylinder for thevalve head with its open end arranged to abut said partion around saidvalve seat and having lateral openings near said open end, a stop onsaid valve stem at the opposite side of the cup from the valve head, anda spring on said valve stem between said stop and the cup normallyiniiuencing said cup toward the valve head, whereby all said parts uponthe valve stem can be inserted into a valve body as a unit andpositioned with respect to one another by said valve stem.

2. A valve comprising a body having an inlet and an outlet separated bya partition with a valve opening surrounded by a valve seat, a valvestemslidably supported in said body at opposite sides of said valve opening,a valve head fixed on said stem to cooperate with said valve seat, a cupslidable upon said valve stem providing a cylinder for the valve headwith its open end arranged to abut said partition around said valve seatand having lateral openings near said open end, a piston disk on saidvalve stem at the opposite side of the cup 'from the valve head forretarding movement of said valve headtoward its seat, a cylinder forsaid piston disk which cylinder when said cup abuts the partition isfixed with respect to said partition, and a spring on said valve stembetween said piston disk and the cup normally influencing said cuptoward the valve head, whereby all said parts upon the valve stem can beinserted into a valve body as a unit and positioned with respect to oneanother by said valve stem.

3. A valve comprising a casing having an inlet passage and an outletpassage separated by a partition formed with a valve opening surroundedby a valve seat, a valve stem slidably mounted in said casing, a valvehead mounted on said stem to cooperate with said valve seat to close andopen said valvev opening upon movement of said stem in the direction offlow of liquid through the valve and in the opposite directionrespectively, a piston on the valve stem for retarding movement of saidvalve head toward its seat, a spring interposed between said piston andsaid casing for influencing said valve head to its seat, a cup looselyslidable upon said valve stem and over said valve head with its open endarranged to abut said partition around said valve seat, a cylinder forsaid piston which cylinder when said cup abuts the partition is fixedwith respect to said partition, and a spring in enga ement with saidpiston for normally in uencing said cup in the direction of closingmovement of said valve head, so that said cup is moved and held fromsaid partition by said valve head on the opening movement of the latterand abuts said partition in advance of said valve head upon closingmovement of the latter, whereby closing movement of said valve head isrestrained.

4. A valve comprising a casing having an inlet passage and an outletpassage separated by a partition formed with a valve opening surroundedby a valve seat, a valve stem slidably mounted in said casing, a valvehead mounted on said stem to cooperate with said valve seat to close andopen said valve opening upon movement of said stem in the direction offlow of liquid through the valve and in the opposite directionrespectively, a cup loosely slidably upon said valve stem and over saidvalve head with its open end arranged to abut said partition around saidvalve seat, a spring for normally influencing said cup in the directionof closing movement of said valve head, so that said cup is moved andheld from said partition by said valve head lon the opening movement ofthe latter and abuts said partition in advance of said valve head uponclosing movement of the latter, a second cup co-aXial and movable withand facing oppositely from said cup, and a piston on said valve stem tohave a loosely reciprocable movement relative to said second cup wherebyclosing movement of said valve head is retarded.

5. A valve comprising a casing having an inlet passage and an outletpassage separated by a partition formed with a valve opening surroundedby a valve seat, a valve stem slidably mounted in said casing, a valvehead mounted on said stem to cooperate with said valve seat to close andopen said valve opening upon movement of said stem in the direction offlow of liquid through the valve and in the opposite directionrespectively, a piston disk fast on said valve stem, a pair ofoppositely facing cups slidable on said valve stem between said pistondisk and valve head and forming cylinders to loosely receive said parts,both said cups being movable with said piston disk and valve head uponopening movement of the latter, and means for limiting movement of saidcups with respect to said piston disk and valve head upon closingmovement of the latter, whereby closing of the said valve head isretarded.

EDWARD MULLER.

